installers/install_kubeadm_cluster.sh

   1 #!/bin/bash
   2 #
   3 #   Licensed under the Apache License, Version 2.0 (the "License");
   4 #   you may not use this file except in compliance with the License.
   5 #   You may obtain a copy of the License at
   6 #
   7 #       http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 #   Unless required by applicable law or agreed to in writing, software
  10 #   distributed under the License is distributed on an "AS IS" BASIS,
  11 #   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 #   See the License for the specific language governing permissions and
  13 #   limitations under the License.
  14 #
  15
  16 set +eux
  17
  18 #installs kubernetes packages
  19 function install_kube() {
  20     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  21     K8S_VERSION=1.23.3-00
  22     # Kubernetes releases can be found here: https://kubernetes.io/releases/
  23     # To check other available versions, run the following command
  24     # curl -s https://packages.cloud.google.com/apt/dists/kubernetes-xenial/main/binary-amd64/Packages | grep Version | awk '{print $2}'
  25     sudo apt-get update && sudo apt-get install -y apt-transport-https
  26     sudo apt-get update && sudo apt-get install -y apt-transport-https
  27     curl -fsSL https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
  28     sudo add-apt-repository "deb https://apt.kubernetes.io/ kubernetes-xenial main"
  29     sudo apt-get update
  30     echo "Installing Kubernetes Packages ..."
  31     sudo apt-get install -y kubelet=${K8S_VERSION} kubeadm=${K8S_VERSION} kubectl=${K8S_VERSION}
  32     cat << EOF | sudo tee -a /etc/default/kubelet
  33     KUBELET_EXTRA_ARGS="--cgroup-driver=cgroupfs"
  34 EOF
  35     sudo apt-mark hold kubelet kubeadm kubectl
  36     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  37 }
  38
  39 #initializes kubernetes control plane
  40 function init_kubeadm() {
  41     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  42     sudo swapoff -a
  43     sudo sed -i.bak '/.*none.*swap/s/^\(.*\)$/#\1/g' /etc/fstab
  44     sudo kubeadm init --config $1
  45     sleep 5
  46     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  47 }
  48
  49 function kube_config_dir() {
  50     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  51     K8S_MANIFEST_DIR="/etc/kubernetes/manifests"
  52     [ ! -d $K8S_MANIFEST_DIR ] && FATAL "Cannot Install Kubernetes"
  53     mkdir -p $HOME/.kube
  54     sudo cp /etc/kubernetes/admin.conf $HOME/.kube/config
  55     sudo chown $(id -u):$(id -g) $HOME/.kube/config
  56     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  57 }
  58
  59 #deploys flannel as daemonsets
  60 function deploy_cni_provider() {
  61     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  62     CNI_DIR="$(mktemp -d -q --tmpdir "flannel.XXXXXX")"
  63     trap 'rm -rf "${CNI_DIR}"' EXIT
  64     wget --retry-on-host-error --retry-on-http-error 404,429,503 --tries=5 https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml -P $CNI_DIR
  65     [ ! -f $CNI_DIR/kube-flannel.yml ] && FATAL "Cannot Install Flannel because $CNI_DIR/kube-flannel.yml was not found. Maybe the file https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml is temporarily not accessible"
  66     kubectl apply -f $CNI_DIR
  67     [ $? -ne 0 ] && FATAL "Cannot Install Flannel"
  68     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  69 }
  70
  71 #taints K8s master node
  72 function taint_master_node() {
  73     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  74     K8S_MASTER=$(kubectl get nodes | awk '$3~/master/'| awk '{print $1}')
  75     kubectl taint node $K8S_MASTER node-role.kubernetes.io/master:NoSchedule-
  76     sleep 5
  77     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  78 }
  79
  80 #Install Helm v3
  81 #Helm releases can be found here: https://github.com/helm/helm/releases
  82 function install_helm() {
  83     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
  84     HELM_VERSION="v3.7.2"
  85     if ! [[ "$(helm version --short 2>/dev/null)" =~ ^v3.* ]]; then
  86         # Helm is not installed. Install helm
  87         echo "Helm3 is not installed, installing ..."
  88         curl https://get.helm.sh/helm-${HELM_VERSION}-linux-amd64.tar.gz --output helm-${HELM_VERSION}.tar.gz
  89         tar -zxvf helm-${HELM_VERSION}.tar.gz
  90         sudo mv linux-amd64/helm /usr/local/bin/helm
  91         rm -r linux-amd64
  92         rm helm-${HELM_VERSION}.tar.gz
  93     else
  94         echo "Helm3 is already installed. Skipping installation..."
  95     fi
  96     helm repo add stable https://charts.helm.sh/stable
  97     helm repo update
  98     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
  99 }
 100
 101 function install_k8s_storageclass() {
 102     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 103     echo "Installing open-iscsi"
 104     sudo apt-get update
 105     sudo apt-get install open-iscsi
 106     sudo systemctl enable --now iscsid
 107     OPENEBS_VERSION="3.1.0"
 108     echo "Installing OpenEBS"
 109     helm repo add openebs https://openebs.github.io/charts
 110     helm repo update
 111     helm install --create-namespace --namespace openebs openebs openebs/openebs --version ${OPENEBS_VERSION}
 112     helm ls -n openebs
 113     local storageclass_timeout=400
 114     local counter=0
 115     local storageclass_ready=""
 116     echo "Waiting for storageclass"
 117     while (( counter < storageclass_timeout ))
 118     do
 119         kubectl get storageclass openebs-hostpath &> /dev/null
 120
 121         if [ $? -eq 0 ] ; then
 122             echo "Storageclass available"
 123             storageclass_ready="y"
 124             break
 125         else
 126             counter=$((counter + 15))
 127             sleep 15
 128         fi
 129     done
 130     [ -n "$storageclass_ready" ] || FATAL "Storageclass not ready after $storageclass_timeout seconds. Cannot install openebs"
 131     kubectl patch storageclass openebs-hostpath -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'
 132     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 133 }
 134
 135 #installs metallb from helm
 136 function install_helm_metallb() {
 137     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 138     echo "Installing MetalLB"
 139     METALLB_VERSION="0.11.0"
 140     METALLB_IP_RANGE="$DEFAULT_IP/32"
 141     echo "configInline:
 142   address-pools:
 143    - name: default
 144      protocol: layer2
 145      addresses:
 146      - $METALLB_IP_RANGE" | sudo tee -a ${OSM_DOCKER_WORK_DIR}/metallb-config.yaml
 147     helm repo add metallb https://metallb.github.io/metallb
 148     helm repo update
 149     helm install --create-namespace --namespace metallb-system metallb metallb/metallb --version ${METALLB_VERSION} -f ${OSM_DOCKER_WORK_DIR}/metallb-config.yaml
 150     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 151 }
 152
 153 #checks openebs and metallb readiness
 154 function check_for_readiness() {
 155     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 156     # Default input values
 157     sampling_period=2       # seconds
 158     time_for_readiness=20   # seconds ready
 159     time_for_failure=200    # seconds broken
 160     OPENEBS_NAMESPACE=openebs
 161     METALLB_NAMESPACE=metallb-system
 162     # STACK_NAME=osm          # By default, "osm"
 163
 164     # Equivalent number of samples
 165     oks_threshold=$((time_for_readiness/${sampling_period}))     # No. ok samples to declare the system ready
 166     failures_threshold=$((time_for_failure/${sampling_period}))  # No. nok samples to declare the system broken
 167     failures_in_a_row=0
 168     oks_in_a_row=0
 169
 170     ####################################################################################
 171     # Loop to check system readiness
 172     ####################################################################################
 173     while [[ (${failures_in_a_row} -lt ${failures_threshold}) && (${oks_in_a_row} -lt ${oks_threshold}) ]]
 174     do
 175         # State of OpenEBS
 176         OPENEBS_STATE=$(kubectl get pod -n ${OPENEBS_NAMESPACE} --no-headers 2>&1)
 177         OPENEBS_READY=$(echo "${OPENEBS_STATE}" | awk '$2=="1/1" || $2=="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 178         OPENEBS_NOT_READY=$(echo "${OPENEBS_STATE}" | awk '$2!="1/1" && $2!="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 179         COUNT_OPENEBS_READY=$(echo "${OPENEBS_READY}"| grep -v -e '^$' | wc -l)
 180         COUNT_OPENEBS_NOT_READY=$(echo "${OPENEBS_NOT_READY}" | grep -v -e '^$' | wc -l)
 181
 182         # State of MetalLB
 183         METALLB_STATE=$(kubectl get pod -n ${METALLB_NAMESPACE} --no-headers 2>&1)
 184         METALLB_READY=$(echo "${METALLB_STATE}" | awk '$2=="1/1" || $2=="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 185         METALLB_NOT_READY=$(echo "${METALLB_STATE}" | awk '$2!="1/1" && $2!="2/2" {printf ("%s\t%s\t\n", $1, $2)}')
 186         COUNT_METALLB_READY=$(echo "${METALLB_READY}" | grep -v -e '^$' | wc -l)
 187         COUNT_METALLB_NOT_READY=$(echo "${METALLB_NOT_READY}" | grep -v -e '^$' | wc -l)
 188
 189         # OK sample
 190         if [[ $((${COUNT_OPENEBS_NOT_READY}+${COUNT_METALLB_NOT_READY})) -eq 0 ]]
 191         then
 192             ((++oks_in_a_row))
 193             failures_in_a_row=0
 194             echo -ne ===\> Successful checks: "${oks_in_a_row}"/${oks_threshold}\\r
 195         # NOK sample
 196         else
 197             ((++failures_in_a_row))
 198             oks_in_a_row=0
 199             echo
 200             echo Bootstraping... "${failures_in_a_row}" checks of ${failures_threshold}
 201
 202             # Reports failed pods in OpenEBS
 203             if [[ "${COUNT_OPENEBS_NOT_READY}" -ne 0 ]]
 204             then
 205                 echo "OpenEBS: Waiting for ${COUNT_OPENEBS_NOT_READY} of $((${COUNT_OPENEBS_NOT_READY}+${COUNT_OPENEBS_READY})) pods to be ready:"
 206                 echo "${OPENEBS_NOT_READY}"
 207                 echo
 208             fi
 209
 210             # Reports failed statefulsets
 211             if [[ "${COUNT_METALLB_NOT_READY}" -ne 0 ]]
 212             then
 213                 echo "MetalLB: Waiting for ${COUNT_METALLB_NOT_READY} of $((${COUNT_METALLB_NOT_READY}+${COUNT_METALLB_READY})) pods to be ready:"
 214                 echo "${METALLB_NOT_READY}"
 215                 echo
 216             fi
 217         fi
 218
 219         #------------ NEXT SAMPLE
 220         sleep ${sampling_period}
 221     done
 222
 223     ####################################################################################
 224     # OUTCOME
 225     ####################################################################################
 226     if [[ (${failures_in_a_row} -ge ${failures_threshold}) ]]
 227     then
 228         echo
 229         FATAL "K8S CLUSTER IS BROKEN"
 230     else
 231         echo
 232         echo "K8S CLUSTER IS READY"
 233     fi
 234     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 235 }
 236
 237 #removes osm deployments and services
 238 function remove_k8s_namespace() {
 239     [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
 240     kubectl delete ns $1 2>&1 >/dev/null
 241     [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 242 }
 243
 244 # main
 245 while getopts ":D:d:i:-: " o; do
 246     case "${o}" in
 247         i)
 248             DEFAULT_IP="${OPTARG}"
 249             ;;
 250         d)
 251             OSM_DOCKER_WORK_DIR="${OPTARG}"
 252             ;;
 253         D)
 254             OSM_DEVOPS="${OPTARG}"
 255             ;;
 256         -)
 257             [ "${OPTARG}" == "debug" ] && DEBUG_INSTALL="y" && continue
 258             echo -e "Invalid option: '--$OPTARG'\n" >&2
 259             exit 1
 260             ;;
 261         :)
 262             echo "Option -$OPTARG requires an argument" >&2
 263             exit 1
 264             ;;
 265         \?)
 266             echo -e "Invalid option: '-$OPTARG'\n" >&2
 267             exit 1
 268             ;;
 269         *)
 270             exit 1
 271             ;;
 272     esac
 273 done
 274
 275 source $OSM_DEVOPS/common/logging
 276 source $OSM_DEVOPS/common/track
 277
 278 echo "DEBUG_INSTALL=$DEBUG_INSTALL"
 279 echo "DEFAULT_IP=$DEFAULT_IP"
 280 echo "OSM_DEVOPS=$OSM_DEVOPS"
 281 echo "OSM_DOCKER_WORK_DIR=$OSM_DOCKER_WORK_DIR"
 282 echo "INSTALL_K8S_MONITOR=$INSTALL_K8S_MONITOR"
 283 echo "HOME=$HOME"
 284
 285
 286 install_kube
 287 track k8scluster install_k8s_ok
 288 init_kubeadm $OSM_DOCKER_WORK_DIR/cluster-config.yaml
 289 kube_config_dir
 290 track k8scluster init_k8s_ok
 291 if [ -n "$INSTALL_K8S_MONITOR" ]; then
 292     # uninstall OSM MONITORING
 293     uninstall_k8s_monitoring
 294     track k8scluster uninstall_k8s_monitoring_ok
 295 fi
 296 #remove old namespace
 297 remove_k8s_namespace osm
 298 deploy_cni_provider
 299 taint_master_node
 300 install_helm
 301 track k8scluster install_helm_ok
 302 install_k8s_storageclass
 303 track k8scluster k8s_storageclass_ok
 304 install_helm_metallb
 305 track k8scluster k8s_metallb_ok
 306 check_for_readiness
 307 track k8scluster k8s_ready_ok
 308